1. Hardware Monitor
Sephiroth Kwon
GRMA

2. OUTLINE Diagram Signal Description temperature sense Theorem
Repair Flow Chart
Repair Technique
Fan Sense
Voltage Sense

3. Super I/O Diagram
PECI (Platform Environment Control Interface) is a new digital interface that enables communication of the temperature reading of a CPU  to the PECI host controller, enabling more efficient platform thermal control than previous methods

4. Select PECI control
Connect to SB
Connect to CPU
Connect to SIO

5. Clock Diagram (for super I/O)
Gen.
Clock Signal
Clock Signal
Super I/O C R
??MHz R
Clock Signal2
Clock Signa2l C
??MHz
The clock signals of W83667,W83627 and ITE 8720 are all 33MHz & 48MHz.
But the ITE 8712’s are 33MHz & 24MHz.
Depends on difference chip

6. Signal Description(W83667HG H/W partial pins)

7. Signal Description(W83667HG H/W partial pins)
SYMBOL
PIN
I/O
DESCRIPTION SI 97
INts
Receive data from Serial Flash. This pin is connected to Serial Flash SO.
AUXFANIN
I/O12ts
0 to +3 V amplitude fan tachometer input. SO 98 O8
Transfer commands, address or data to Serial Flash. This pin is connected to Serial Flash SI.
AUXFANOUT
AOUT O12 OD12
DC / PWM fan output control.
CASEOPEN#
100
INt
CASE OPEN. An active-low input from an external devicewhen the case is open. This signal can be latched if pin VBAT isconnected to the battery, even if the W83667HG-A is turned off.Pulling up a 2-MΩ resistor to VBAT is recommended if not inuse.
SLOTOCC#
102
To detect CPU present or not.
GP56
I/OD12t
General-purpose I/O port 5 bit 6.
VIN1
104
AIN
Analog Inputs for voltage measurement (Range: 0 to V)
VIN0
105
Analog Inputs for voltage measurement (Range: 0 to V)
CPUVCORE
107
VREF
108
AOUT
Reference Voltage (2.048 V).
VIN2
109
AUXTIN
The input of temperature sensor 3. It is used for temperaturesensing.
CPUTIN
110
The input of temperature sensor 2. It is used for CPUtemperature sensing.
SYSTIN
111
The input of temperature sensor 1. It is used for systemtemperature sensing.
CPUFANIN
124
CPUFANOUT
125
SYSFANIN
126
SYSFANOUT
127
SMI#
128
OD12
System Management Interrupt channel output.
OVT#
The output of over temperature Shutdown. This pin indicates the temperature is over the temperature limit. (Default after PCIRST)

8. Signal Description(W83627DHG H/W partial pins)
the two divider resistors of the voltage

9. Signal Description(W83627DHG H/W partial pins)
SYMBOL
PIN
I/O
DESCRIPTION
BEEP
118
OD8
Beep function for hardware monitor. This pin is low after system reset. SO O8
Transfer commands, address or data to serial flash. This pin is connected to SI of serial flash.
CASEOPEN# 76
INt
CASE OPEN detection. An active-low input from an external device when the case is open. This signal can be latched if pin VBAT is connected to the battery, even if the W83627DHG-A is turned off. Pulling up a 2-MW resistor to VBAT is recommended if not in use.
VIN3 96
AIN
Analog Inputs for voltage measurement (Range: 0 to V)
VIN2 97
VIN1 98
Analog Inputs for voltage measurement (Range: 0 to V)
VIN0 99
CPUVCORE
100
VREF
101
AOUT
Reference Voltage (2.048 V).
AUXTIN
102
The input of temperature sensor 3. It is used for temperature sensing.
CPUTIN
103
The input of temperature sensor 2. It is used for CPU temperature sensing.
SYSTIN
104
The input of temperature sensor 1. It is used for system temperature sensing.
OVT# 5
OD12
The output of over temperature Shutdown. This pin indicates the temperature is over the temperature limit. (Default after LRESET#)
SMI#
System Management Interrupt channel output.
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0
I/O12
VID input detection, also with output control.

10. Signal Description(W83627DHG H/W partial pins)
SYMBOL
PIN
I/O
DESCRIPTION
AUXFANIN1 58
I/O12ts
0 to +3 V amplitude fan tachometer input. SI
INts
Receive data from serial flash. This pin is connected to SO of serial flash.
AUXFANIN0 CPUFANIN0 SYSFANIN
CPUFANIN1
119
0 to +3 V amplitude fan tachometer input. (Default)
GP21
I/OD12t
General-purpose I/O port 2 bit 1.
AUXFANOUT
AOUT/ OD12/ O12
DC/PWM fan output control. CPUFANOUT0 and AUXFANOUT are default PWM mode, CPUFANOUT1 and SYSFANOUT are default DC mode.
CPUFANOUT0 SYSFANOUT
CPUFANOUT1
120
DC/PWM fan output control. (Default) CPUFANOUT0 and AUXFANOUT are default PWM mode, CPUFANOUT1 and SYSFANOUT are default DC mode.
GP20
Genera l-purpose I/O port 2 bit 0.
FAN_SET
117
INtd
Determines the initial FAN speed. Power on configuration for 2 fan speeds, 50% or 100%. During power-on reset, this pin is pulled down internally and the fan speed is 50%. Only CPUFANOUT0 is supported.
PLED
O12
Power LED output. Drive high 3.3 V after strapping.

11. Theorem (Temp. Sense) Super IO CPU Temperature BIOS Menu Super I/O
Motherboard Temperature
ASUS PC Probe

12. Theorem (Temp. Sense-W83667)
Thermistor, temperature

13. Theorem (Temp. Sense-W83627 )

14. Repair Flow Chart (Temp. Sense)
START
Check VREF is ok
Confirm CPU fan attached on the CPU is good, rotation is ok.
Check real CPU/ MB temp. is ok
Check VREF related circuit, R.C. components are good
Change NG CPU fan or any NG R.C.L.Q. for fan power circuit
Change any NG R.C. components
Check Temp. sense related
circuit is ok
Check Temp. sense related circuit, R.C. components are good
Finished
Change I/O (H.M. controller) OK NG
Check Bios is ok
Change Bios if Bios is NG

15. Repair Technique (Temp. Sense)
Check real CPU or MB temperature is ok or not, if ok change bios first; if NG check CPU fan rotation and contact is good.
Check VREF (Reference Voltage). If NG check VREF related resistor & capacitor.
Check Temp. Sense signal (TR CPU or TR MB).If NG check related resistor & capacitor.
4. If check above signals there’s nothing abnormal, please try to change super I/O (Hardware Monitor controller).

16. Theorem (Fan Sense) Super IO Chassis FAN BIOS Menu Power FAN Super I/O
CPU FAN
ASUS PC Probe

17. Diagram Sample (Fan Sense)
Connect to SIO

18. Diagram Sample(Fan Sense)

19. Repair Flow Chart (Fan Sense)
START
Change Bios if Bios cause Fan RPM error
Check Bios is OK
Check Fan sense related
circuit is ok
Check Fan sense related circuit, R.C. components are good
Change any NG R.C. components
Finished OK NG
Check real fan rotation is ok
Check fan power 12V is ok
Change NG transistor for 12 V fan power
Change I/O (H.M. controller)

20. Repair Technique (Fan Sense)
Check real fan rotation is ok or not, if NG check fan 12V related circuit. Especially check fan transistor which provides fan 12V.
Check Bios is ok or not.
Check Fan Sense signal (CPU Fan, Chassis Fan, Power Fan). If NG check related resistor & capacitor.
If check above signals there’s nothing abnormal, please try to change super I/O (Hardware Monitor controller).

21. Theorem (Voltage Sense)
Super IO
BIOS Menu
Super I/O
Power Supply
5V、12V、3.3V
ASUS PC Probe

22. Theorem (Voltage Sense-W83667)

23. Theorem (Voltage Sense-W83627)

24. Repair Flow Chart (Voltage Sense)
START
Change Bios if Bios cause voltage detect error
Check Bios is OK
Check Voltage sense related
circuit is ok
Check Voltage sense related circuit, R.C. components are good
Change any NG R.C. components cause voltage detect error
Finished
Change I/O (H.M. controller) OK NG
Check real voltage is ok
(Vcore,3, 5, 12 V)
Check Vcore circuit, power supply and power cable is ok.
Change NG power supply. Cable or Vcore related NG component
Check VREF is OK
Check VREF related circuit, R.C. components are good
Change any NG R.C. components

25. Repair Technique (Voltage Sense)
Check real voltage (Vcore, 3.3V, 5V ,12V )is ok or not, if ok change bios first; if NG check Vcore related circuit or check power supply (power supply cable also included) is good.
Check VREF (Reference Voltage). If NG check VREF related resistor & capacitor(104P).
Check Voltage Sense signal (12Vin, 5Vin, 3Vin..).If NG check related resistor & capacitor.
If check above signals there’s nothing abnormal, please try to change super I/O (Hardware Monitor controller).

26. Thank You!